Finding the Fourth Proportional to 138,646.81, 191,332.65 and 74,984.62
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Solution
The fourth proportional to 138,646.81, 191,332.65 and 74,984.62 is: 103,478.80
Step by Step Solution
- Step 1: Write the proportion equation
138,646.81 : 191,332.65 = 74,984.62 : x - Step 2: Convert to fraction form
138,646.81/191,332.65 = 74,984.62/x - Step 3: Cross multiply
138,646.81x = 191,332.65 × 74,984.62 - Step 4: Simplify right side
138,646.81x = 14,347,006,053.84 - Step 5: Solve for x
x = 14,347,006,053.84/138,646.81 - Step 6: Final answer
x = 103,478.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.